Developer data appears in the upper left corner of the screen

Very simple, I downloaded the new snapshot to test the new features, but as soon as Minecraft opened, I noticed information about the game, the strange thing is that it is completely turned upside down, I took a picture of it and turned it over to know what it said and put the FPS, Game time and real life time, for some reason I have closed and reopened the game and it no longer appears, I don't know why.